I use two PicoScope 5243A in a project. Both PicoScopes worked fine for about 6 month. But now from one day to the other PicoScope software says that the devices does not respond. Both devices are visible in windows device manager and windows device manager says that the driver is installed and all is fine. And both devices are recognized by PicoScope software and are visible in the PicoScope device list. (attached screenshot shows one device connected to the PC) I can select the device but then the PicoScope software says that the device does not respond. (Both PicoScopes are powered by an external power supply.)

Do you have any suggestions what happend with the PicoScopes and how it can be fixed?